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    Carrier coating processes
    5.
    发明授权
    Carrier coating processes 失效
    载体涂层工艺

    公开(公告)号：US6004717A

    公开(公告)日：1999-12-21

    申请号：US876100

    申请日：1997-06-13

    申请人： John A. Creatura ,  K. Derek Henderson ,  Bernard A. Kelly

    发明人： John A. Creatura ,  K. Derek Henderson ,  Bernard A. Kelly

    IPC分类号： G03G9/113 ,  G03G9/10

    CPC分类号： G03G9/1131 ,  G03G9/1132

    摘要： A process comprising:blending core particles with a first coating resin or resin mixture to produce a first blend;heating the resulting first blend to produce first coated particles;blending the resulting first coated particles with a second coating resin or resin mixture to form a second blend; andheating the second blend to afford second or twice coated particles.

    摘要翻译： 一种方法，包括：将核心颗粒与第一涂料树脂或树脂混合物混合以产生第一共混物; 加热所得到的第一共混物以产生第一涂覆颗粒; 将得到的第一涂覆颗粒与第二涂料树脂或树脂混合物共混以形成第二共混物; 并加热第二共混物以提供第二或两次涂覆的颗粒。

    Surfactant-free semi-continuous emulsion polymerization process for making submicron sized particles for carrier coatings
    7.
    发明授权
    Surfactant-free semi-continuous emulsion polymerization process for making submicron sized particles for carrier coatings 有权
    用于制造载体涂层的亚微米尺寸颗粒的无表面活性剂半连续乳液聚合方法

    公开(公告)号：US06399701B1

    公开(公告)日：2002-06-04

    申请号：US09570724

    申请日：2000-05-15

    申请人： Thomas E. Enright ,  Anthony James Paine ,  George Liebermann ,  Kenneth Derek Henderson ,  Scott M. Silence ,  Bernard A. Kelly

    发明人： Thomas E. Enright ,  Anthony James Paine ,  George Liebermann ,  Kenneth Derek Henderson ,  Scott M. Silence ,  Bernard A. Kelly

    IPC分类号： C08L3102

    CPC分类号： G03G9/1133 ,  C08F2/22 ,  C08F20/14 ,  G03G9/1131

    摘要： Submicron sized particles of poly(methyl methacrylate) are prepared by a surfactant-free semi-continuous emulsion polymerization process that involves (i) preparing an aqueous phase containing a free radical initiator in water by heating and stirring, (ii) preparing a monomer composition containing at least 80% by weight methyl methacrylate and 1 to 10% by weight of a crosslinking agent, (iii) adding the monomer composition to the aqueous phase to initiate emulsion polymerization of the monomer composition, the adding being done at a rate such that from 0.05% to 5% by weight of the total weight of the monomer composition is added per minute, (iv) continuing heating and stirring following completion of the adding of the monomer composition for an amount of time, and (v) drying and recovering the submicron sized particles of poly(methyl methacrylate). The submicron sized particles of poly(methyl methacrylate are used in forming a coating of carrier particles for a two-component developer composition.

    摘要翻译： 聚甲基丙烯酸甲酯的亚微米尺寸颗粒是通过无表面活性剂的半连续乳液聚合方法制备的，其包括（i）通过加热和搅拌在水中制备含有自由基引发剂的水相，（ii）制备单体组合物 含有至少80重量％的甲基丙烯酸甲酯和1至10重量％的交联剂，（iii）将单体组合物加入到水相中以引发单体组合物的乳液聚合，加入的速率使得 每分钟加入0.05〜5重量％的单体组合物，（iv）在完成单体组合物加入一段时间后继续加热和搅拌，（v）干燥和回收 聚甲基丙烯酸甲酯的亚微米尺寸颗粒。 聚（甲基丙烯酸甲酯）的亚微米尺寸的颗粒用于形成用于双组分显影剂组合物的载体颗粒的涂层。

    Polymer coated carrier particles for electrophotographic developers
    8.
    发明授权
    Polymer coated carrier particles for electrophotographic developers 有权
    用于电子照相显影剂的聚合物涂覆的载体颗粒

    公开(公告)号：US06245474B1

    公开(公告)日：2001-06-12

    申请号：US09520446

    申请日：2000-03-07

    申请人： George R. Hsu ,  Scott M. Silence ,  Lynne M. Tatar ,  Bernard A. Kelly ,  Pinyen Lin

    发明人： George R. Hsu ,  Scott M. Silence ,  Lynne M. Tatar ,  Bernard A. Kelly ,  Pinyen Lin

    IPC分类号： G03G910

    CPC分类号： G03G9/1133 ,  G03G9/10 ,  G03G9/107 ,  G03G9/1134

    摘要： A coated carrier having a core particle coated with a mixture of an electronegative insulating polymer comprising a polyvinylidenefluoride polymer or copolymer and an electropositive conductive polymer comprising a polymethyl methacrylate polymer or copolymer with a conductive material dispersed therein is made by powder coating. The coated carrier has unique properties, including a conductivity of from 1.1×10−14 to 1.0×10−8 mho-cm−1, a triboelectric charging value of from 12 to 20 and an average particle diameter of from 65 to 75, rendering the coated carrier ideal for use in a developer to be used in a magnetic brush type development apparatus. The powder coating method includes mixing the core particle and the mixture of negatively charging polymer and conductive polymer until the mixture of negatively charging polymer and conductive polymer adheres to the core particle, heating the mixture of the core particle and the mixture of negatively charging polymer and conductive polymer until the mixture of negatively charging polymer and conductive polymer melts and fuses to the core particle, and cooling the coated core obtained.

    摘要翻译： 通过粉末涂料制成涂覆载体，其具有涂覆有包含聚偏二氟乙烯聚合物或共聚物的电负极绝缘聚合物和包含分散有导电材料的聚甲基丙烯酸甲酯聚合物或共聚物的正电导电聚合物的混合物的核心颗粒。 涂层载体具有独特的性能，包括电导率为1.1×10-14至1.0×10-8mho-cm-1，摩擦带电值为12至20，平均粒径为65至75，使涂层 载体用于用于磁刷式显影装置的显影剂中。 粉末涂布方法包括将核心颗粒和负电荷聚合物和导电聚合物的混合物混合，直到带负电的聚合物和导电聚合物的混合物粘附到核心颗粒，加热核心颗粒和负电聚合物的混合物和 导电聚合物，直到带负电的聚合物和导电聚合物的混合物熔化并熔化到核心颗粒，并冷却涂覆的芯获得。